Question

4. Order the chemical shifts of the circled prions in the following list of compounds form the farthest downfield (highest ppm number) to lowest. (5 points) H .CH.CH 5. The IR spectra of the following compounds should a strong broad signal centered at 3520 em". After a chemical reaction was performed on this compound the signal at 3520 had disappeared and was replaced by a strong signal at 1720. Which set of reactants and products agrees with this experimental data? (6 points) 8 6. A l spectrum of an aromatic di-halide showed 4 carbon signals in the aromatic region of the spectra. Which of the following structures is constant with this data? (6 points)
could someoneplease explain to me chemical shifts and spectrum.

Answer 1

0 . chych - b Order o highest de ppm lowest ppm. Due to magnetic aneso tropy the carbonyl group has the highest dishielded proton and hence to higher chemical swift value. since there is no any election withdrawing group is attached with @ and hence has t the resonating frequency required is very less GOOD WRITE

Option (1) agrees with the experimental data, 1 Reason on # go alwhol d a ketone - The broad signal centered at 3520 cm was due to the secondary alcohol. The signal was broad I because of intermolecular H-bonding present between alwhol molecules. The disappearance of 3520 cm i signal and confirms that there is no more on group is present in the molecule. L The appearance characterstich Hence option - co group in of 1720 cm signal is a book of carbonyl groups. (D) which had a product is the correct answer

E DATE: JUN E PAGE - - planeef syrometry Tra 4 carbon_signals in aromatic region shows that I the compound must have 4 different types of Carbon atoms within the molecule. Only this structure has ... 4 different types of O carbon atom hence the correct answer